Wasuraremu na wa yo ni furaji samidare mo ikade ka shibashi oyamazarubeki - Kinyo Wakashu(English Translation & Meaning)

忘られむ名は世にふらじ五月雨も
いかでかしばしをやまざるべき

Roma-ji: Wasuraremu na wa yo ni furaji samidare mo ikade ka shibashi oyamazarubeki
English Translation: A name as forgotten
will not fall and spread through the world;
even May's long rains,
how could they fail to let up
for a little while at least
Meaning: The name of one forgotten will not spread through the world; even the long rains of May, how could they not let up for a while?
Commentary: Book Eight Love Poems II 490

The name of a forgotten woman will not spread and grow old in the world, the poet says, for even the early summer rains let up for a while. As the seemingly endless rains have their clear spells, he consoles her that his visits too will come in time.
It appears to be a reply to the preceding poem, 489, turning back its play on the rains and furu.

First line, 'wasuraremu', means that one will be forgotten, the passive ru followed by the conjectural mu.
Second line, 'na wa yo ni furaji', is a pivot word in which fura means both rain falling and a name growing old, left in kana. With the negative conjectural ji the poem breaks after the second line. It is the same pivot word as furinikeru in the final line of the preceding poem, 489.
Third line, 'samidare mo', means even the long rains, the same word as the first line of the preceding poem, 489.
Fourth line, 'ikade ka shibashi', means how could it not, even for a while, the particle ka answered by beki in the final line.
Final line, 'oyamazarubeki', means fail to let up, oyamu meaning for rain to stop briefly. Zaru, the attributive of the negative zu, followed by beki, the attributive of beshi, forms a rhetorical question.
Source: Kinyo Wakashu
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